package com.gome.ocean.common.utils;

import java.io.ByteArrayInputStream;
import java.io.UnsupportedEncodingException;
import java.sql.Blob;
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;

/**
 * @author zhangguoqing 2016年12月14日 上午11:57:09
 * @since 5.0.0
 */
public class ConvertBlobTypeHandler extends BaseTypeHandler<String> {

    private static final String DEFAULT_CHARSET = "utf-8";

    @Override
    public void setNonNullParameter(PreparedStatement ps, int i, String parameter,
                                    JdbcType jdbcType) throws SQLException {
        ByteArrayInputStream bis;
        try {
            // ###把String转化成byte流
            bis = new ByteArrayInputStream(parameter.getBytes(DEFAULT_CHARSET));
        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException("Blob Encoding Error!");
        }
        ps.setBinaryStream(i, bis, parameter.length());
    }

    @Override
    public String getNullableResult(ResultSet rs, String columnName) throws SQLException {
        Blob blob = rs.getBlob(columnName);
        byte[] returnValue = null;
        if (null != blob) {
            returnValue = blob.getBytes(1, (int) blob.length());
            try {
                // ###把byte转化成string
                return new String(returnValue, DEFAULT_CHARSET);
            } catch (UnsupportedEncodingException e) {
                throw new RuntimeException("Blob Encoding Error!");
            }
        } else {
            return "";
        }
    }

    @Override
    public String getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
        Blob blob = cs.getBlob(columnIndex);
        byte[] returnValue = null;
        if (null != blob) {
            returnValue = blob.getBytes(1, (int) blob.length());
            try {
                return new String(returnValue, DEFAULT_CHARSET);
            } catch (UnsupportedEncodingException e) {
                throw new RuntimeException("Blob Encoding Error!");
            }
        } else {
            return "";
        }
    }

    @Override
    public String getNullableResult(ResultSet arg0, int arg1) throws SQLException {
        // TODO Auto-generated method stub
        return null;
    }

}
